Magnetization dynamics down to zero field in dilute (Cd,Mn)Te quantum wells

The evolution of the magnetization in (Cd,Mn)Te quantum wells after a short pulse of magnetic field was determined from the giant Zeeman shift of spectroscopic lines. The dynamics in absence of magnetic field was found to be up to three orders of magnitude faster than that at 1 T. Hyperfine interaction and strain are mainly responsible for the fast decay. The influence of a hole gas is clearly visible: at zero field anisotropic holes stabilize the system of Mn ions, while in a magnetic field of 1 T they are known to speed up the decay by opening an additional relaxation channel

Serum metabolomics approach to monitor the changes in metabolite profiles following renal transplantation

Systemic metabolic changes after renal transplantation reflect the key processes that are related to graft accommodation. In order to describe and better understand these changes, the 1HNMR based metabolomics approach was used. The changes of 47 metabolites in the serum samples of 19 individuals were interpreted over time with respect to their levels prior to transplantation. Considering the specific repeated measures design of the experiments, data analysis was mainly focused on the multiple analyses of variance (ANOVA) methods such as ANOVA simultaneous component analysis and ANOVA-target projection. We also propose here the combined use of ANOVA and classification and regression trees (ANOVA-CART) under the assumption that a small set of metabolites the binary splits on which may better describe the graft accommodation processes over time. This assumption is very important for developing a medical protocol for evaluating a patient’s health state. The results showed that besides creatinine, which is routinely used to monitor renal activity, the changes in levels of hippurate, mannitol and alanine may be associated with the changes in renal function during the post-transplantation recovery period. Specifically, the level of hippurate (or histidine) is more sensitive to any short-term changes in renal activity than creatinine

3D Topological Semimetal Phases of Strained α\alpha-Sn on Insulating Substrate

$\alpha$-Sn is an elemental topological material, whose topological phases can be tuned by strain and magnetic field. Such tunability offers a substantial potential for topological electronics. However, InSb substrates, commonly used to stabilize $\alpha$-Sn allotrope, suffer from parallel conduction, restricting transport investigations and potential applications. Here, the successful MBE growth of high-quality $\alpha$-Sn layers on insulating, hybrid CdTe/GaAs(001) substrates, with bulk electron mobility approaching 20000 cm$^2$V$^{-1}$s$^{-1}$ is reported. The electronic properties of the samples are systematically investigated by independent complementary techniques, enabling thorough characterization of the 3D Dirac (DSM) and Weyl (WSM) semimetal phases induced by the strains and magnetic field, respectively. Magneto-optical experiments, corroborated with band structure modeling, provide an exhaustive description of the bulk states in the DSM phase. The modeled electronic structure is directly observed in angle-resolved photoemission spectroscopy, which reveals linearly dispersing bands near the Fermi level. The first detailed study of negative longitudinal magnetoresistance relates this effect to the chiral anomaly and, consequently, to the presence of WSM. Observation of the $\pi$ Berry phase in Shubnikov-de Haas oscillations agrees with the topologically non-trivial nature of the investigated samples. Our findings establish $\alpha$-Sn as an attractive topological material for exploring relativistic physics and future applications.Comment: Main text: 35 pages, 7 figures; Supplementary Materials: 22 pages, 12 figure

Laryngeal embryonal rhabdomyosarcoma in an adult - A case presentation in the eyes of geneticists and clinicians

<p>1. Abstract</p> <p>Background</p> <p>Rhabdomyosarcoma is a solid tumor, resulting from dysregulation of the skeletal myogenesis program. For rhabdomyosarcomas (RMS) with a predilection for the head and neck, genitourinary tract, extremities, trunk, retroperitoneum, the larynx is still an unusual site. Till now only several cases of this laryngeal tumor have been described in world literature in the adult population. The entire spectrum of genetic factors underlying RMS development and progression is unclear until today. Multiple signaling pathways seem to be involved in ERMS development and progression.</p> <p>Case presentation</p> <p>In this paper we report an interesting RMS case in which the disease was located within the glottic region. We report an embryonal rhabdomyosarcoma of the larynx in 33 year-old man. After unsuccessful chemotherapy hemilaryngectomy was performed. In follow up CT no signs of recurrence were found. Recently patient is recurrence free for 62 months.</p> <p>Conclusions</p> <p>Considering the histological diagnosis and the highly aggressive nature of the lesion for optimal diagnosis positron electron tomography (PET) and computerized tomography (CT) of the neck and thorax should be performed. At this time surgical treatment with adjuvant radiotherapy seems to be the treatment of choice for this disease. Rhabdomyosarcoma of the larynx has a better prognosis than elsewhere in the body, probably because of its earlier recognition and accessibility to radical surgery.</p

The 42nd Symposium Chromatographic Methods of Investigating Organic Compounds : Book of abstracts

The 42nd Symposium Chromatographic Methods of Investigating Organic Compounds : Book of abstracts. June 4-7, 2019, Szczyrk, Polan

System motywowania kadry kierowniczej w centrach odpowiedzialności

W artykule opisano wybrane elementy systemu motywacji w przedsiębiorstwie, ze zwróceniem uwagi szczególnie na czynniki i instrumenty motywowania kadry kierowniczej. Przedstawiono także system zadaniowy oraz kompetencje i obowiązki kierowników jednostek organizacyjnych, jak również zakresy ich działalności w ramach centrów odpowiedzialności. Podano odmiany kontraktów kierowniczych, które stanowią formalne ramy implementacji czynników motywowania kierowników. Celem artykułu jest prezentacja koncepcji systemu motywacyjnego kadry kierowniczej centrum odpowiedzialności oraz prezentacja wyników badań empirycznych. Jako przedmiot analizy przyjęto czynniki i narzędzia pobudzania motywacji pracy kadry kierowniczej, natomiast odniesienie stanowią działalność i rozwój przedsiębiorstwa. Zakres badań ograniczono głównie do stanowisk pracy centrum zysku oraz centrum kosztów normatywnych i centrum dochodów w mniejszym stopniu. Do realizacji celów artykułu wykorzystano metody badawcze: analiza literatury, analiza pracy, modelowanie, wywiad, badania eksperckie i analiza przypadku. Zaprezentowaną koncepcję systemu motywowania kadry kierowniczej w centrach odpowiedzialności oparto na poglądach autorów podkreślających, że to głównie zarządzanie organizacją i warunki pracy są kluczowe w motywacji pracy, jak również na wynikach analizy pracy oraz propozycjach kierowników – zebranych w trakcie wywiadu. W koncepcji tej ujęto 10 grup czynników motywacji, które stanowią podklasę pozapłacowych czynników motywacji oraz podklasę czynników płacowych, to jest systemu wynagradzania i systemu zadaniowego centrum odpowiedzialności. Ustalone czynniki mogą stanowić podstawę budowy systemów motywacyjnych kierowników jednostek o niższym stopniu autonomii i samodzielności, w tym kierowników jednostek funkcjonalnych wyodrębnionych w scentralizowanej strukturze.The article describes selected elements of the motivation system in an enterprise, paying particular attention to the factors and instruments of motivating the managerial staff. The task system as well as the competences and duties of the heads of organizational units are also presented, together with the scopes of their activities within the responsibility centres. Varieties of management contracts are given, which form the formal framework for the implementation of the factors motivating managers. The aim of the article is to present the concept of a motivation system for the management of a responsibility centre and the results of empirical research. Factors and tools for stimulating the motivation of the work of managerial staff are adopted as the subject of the analysis, while the activity and development of the enterprise are the reference. The scope of the research was limited mainly to the positions of the profit centre and the normative cost centre, and to a lesser extent the income centre. The following research methods were used to achieve the objectives of the article: literature analysis, work analysis, modelling, interview, expert research and case study. The presented concept of a motivation system for management in responsibility centres is based on the views of the authors emphasizing that it is mainly the management of the organization and working conditions that are the key in the motivation of work, as well as the results of work analysis and managers’ proposals-collected during the interviews. This concept covers 10 groups of motivation factors, which constitute a subclass of non-salary motivation factors and a subclass of salary factors, i.e. the remuneration system and the task-based system of the responsibility centre. Established factors may constitute the basis for building motivation systems for managers of units with a lower degree of autonomy and independence, including managers of functional units separated in a centralized structure

I Don&rsquo;t Want to Be Thin! Fear of Weight Change Is Not Just a Fear of Obesity: Research on the Body Mass Anxiety Scale

Anxiety is one of the psychological factors associated with body weight experienced by people attempting to live up to expectations of an ideal body shape. The stigma of excessive or too low body weight and the stigmatization of people because of it is becoming a widespread problem with negative psychological and social consequences. One effect of the strong social pressure of beauty standards dependent on low body weight is the development of eating disorders and negative societal attitudes toward overweight or obese people. Research conducted to date has mainly focused on one dimension of weight-related anxiety&mdash;the fear of getting fat. Ongoing research has also revealed the other side of weight-related anxiety&mdash;fear of weight loss. Therefore, the purpose of the present project was to develop a two-dimensional scale to diagnose the level of weight-related anxiety and to preliminarily test the psychometric properties of the emerging constructs. Results: the BMAS-20 weight-related anxiety scale in both Polish and English versions was developed and its psychometric properties were confirmed. The components of body weight-change anxiety that emerged were: anxiety about getting fat and anxiety about losing weight. It was found that both AGF and ALW may have a protective function related to awareness of the negative consequences of poor eating and the health risks associated with it. Above-normal levels of anxiety may be a predictor of psychopathology. Both AGF and ALW are associated with symptoms of depression

I Don’t Want to Be Thin! Fear of Weight Change Is Not Just a Fear of Obesity: Research on the Body Mass Anxiety Scale

Anxiety is one of the psychological factors associated with body weight experienced by people attempting to live up to expectations of an ideal body shape. The stigma of excessive or too low body weight and the stigmatization of people because of it is becoming a widespread problem with negative psychological and social consequences. One effect of the strong social pressure of beauty standards dependent on low body weight is the development of eating disorders and negative societal attitudes toward overweight or obese people. Research conducted to date has mainly focused on one dimension of weight-related anxiety—the fear of getting fat. Ongoing research has also revealed the other side of weight-related anxiety—fear of weight loss. Therefore, the purpose of the present project was to develop a two-dimensional scale to diagnose the level of weight-related anxiety and to preliminarily test the psychometric properties of the emerging constructs. Results: the BMAS-20 weight-related anxiety scale in both Polish and English versions was developed and its psychometric properties were confirmed. The components of body weight-change anxiety that emerged were: anxiety about getting fat and anxiety about losing weight. It was found that both AGF and ALW may have a protective function related to awareness of the negative consequences of poor eating and the health risks associated with it. Above-normal levels of anxiety may be a predictor of psychopathology. Both AGF and ALW are associated with symptoms of depression